Optimism USDC Batch Sender

WHAT IT DOES

This tool enables the batch distribution of USDC (USD Coin) to multiple recipient addresses in a single atomic transaction on Optimism (the leading Ethereum Layer 2 network). It connects to your wallet via BGWallet, reads the USDC contract bytecode and verified source, fetches your current balance and allowance, and constructs a batched transfer that sends USDC to each address with specified amounts. The batch executes through the BotGentz sender contract, ensuring all recipients receive their tokens simultaneously or the entire transaction reverts. This is ideal for stablecoin payroll, treasury distributions, cross-chain settlements, DAO funding allocations, or any scenario requiring efficient multi-recipient transfers of the second most widely used stablecoin on Optimism's low-cost, high-speed OP Stack L2.

HOW TO USE

1. Connect your wallet using the "Connect" button (BGWallet integration).

2. Ensure you are on Optimism (chain ID 10) — the tool will prompt you to switch if needed.

3. Enter the USDC contract address (defaults to the official Optimism USDC: 0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85).

4. Click "Load token details" to automatically detect the token's symbol and decimals (6 on Optimism).

5. Paste your recipient list — one address and USDC amount per line, separated by space or comma.

6. Click "Parse & preview" to validate addresses and see a summary table.

7. Review the sender information: your address, USDC balance, required total (including network fee), current allowance, and the batch sender contract details.

8. If allowance is insufficient, click "Approve" to authorize the sender contract to spend your USDC.

9. Click "Send batch" to execute the atomic transfer. The progress bar will show transaction status.

TECHNICAL MECHANISM

The tool leverages the BotGentz multisender contract (BULKSEND registry) which implements a batched ERC-20 transfer function. It dynamically fetches the current fee and owner address from the contract (never hardcoding stale values). The approval process grants exactly the required total amount — not an unlimited allowance — enhancing security. The contract uses the `sendERC20` method, which takes arrays of recipient addresses and amounts, processes each transfer in a loop, and ensures all succeed before finalizing. The transaction includes the protocol fee as `msg.value`. The tool automatically detects USDC's 6 decimals on Optimism (unlike the 18 decimals typical of many ERC-20s), ensuring precise amount parsing and display. It validates total required funds against the sender's balance before submission, catching underfunding early. Optimism L2 gas mechanics are handled through the provider, with the tool estimating gas using the contract's `estimateGas` function and applying a 20% safety margin. Optimism's OP Stack architecture ensures fast finality and low transaction costs.

WHAT IT CANNOT SEE

This tool cannot guarantee recipient addresses are valid beyond basic Ethereum address format validation (0x + 40 hex characters). It does not verify if recipients are contracts, if they can receive USDC, or if they have been blacklisted by the USDC contract (Circle maintains a blacklist for sanctioned addresses). The tool cannot recover from a failed batch — due to the atomic nature of the transaction, if any single transfer fails (e.g., blacklisted recipient, insufficient gas, contract revert), the entire batch reverts and no USDC is sent to anyone. It cannot send to zero addresses or self, or exceed the block gas limit (which limits batch size). The tool does not simulate the transaction beforehand, so unexpected reverts may occur during execution. It relies entirely on the USDC contract behaving as expected — any changes to the USDC contract's logic (e.g., upgrades, pausing, blacklist updates) could cause the batch to fail. USDC's 6 decimal precision means amounts must be entered with appropriate precision — amounts smaller than 0.000001 USDC cannot be represented. The tool cannot detect if recipients have custom hooks or if they will accept USDC. Optimism-specific considerations include sequencer dependencies and varying gas prices that may affect transaction propagation, as well as the OP Stack's unique fee structure.

PLEASE NOTE

This tool is designed exclusively for Optimism (chain ID 10). It reads the chain ID and uses the BULKSEND registry to locate the appropriate sender contract (the registry includes Optimism at 0x956D760F8665358Ea1a9F11b82913020e5479376). The sender contract charges a fee in ETH (native gas token on Optimism), which is displayed before signing. Always review the fee, contract address, and owner before approving or sending. This tool is provided as-is — verify all transactions carefully, especially when dealing with USDC which has blacklist functionality and 6 decimal precision. Transactions on Optimism may have different confirmation times and gas costs compared to Ethereum L1, and may be subject to sequencer-related delays inherent to the OP Stack architecture.